Pneumatic tire.



1.]. SEXTON. PNEUMATIC TIRE. APPUCATION FILED AUGJI. 1914i PatentedMay14,1918.

2 SHEETS-SHEET I.

UNITED .s'r r s PATENTOFFIOE.

1 JAMES J. 'snx'ron, or COLUMBUS, OHIO.

T a alt whom it may concern:

lie it known thatI, JAMES J. SEx'ro-N, a citlzen of the United States,residing at Columbus, in the county of Franklin and State "Ohio, haveinvented certain new and useful Improvements in Pneumatic lljires, of.:-which the following is a specifica- 1on.

I It is the object of my invention to pro- 110 vide protecting means ina p'neumatic'tire whereby punctures and blow-outs are prevented, and theinvention consists in providing a non-friction inner lining of combrousmaterial between the outer e'of thetire and the inner pneu- 111 1cub'eFtliereOf, so arranged that a puncture-resisting flexible layer isinterposed between said outer casing and pneumatic tube at the treadportions andto the sides of the tread portions thereof, acting tosustain the pressure of the. inner pneumatic tube at each pointofcontact of said tube with said lining over a wide area of the fibrouslining, whereby to prevent localizing of the pressure of the inner orneumatic tube upon a weakened portion of the outer casing or shoe forpreventing blow-outs.

The invention will be further readily understood from the followingdescription and claims, and from the drawings, in which epresents asideelevation of a ay for better illustration of cross-section of thesame 'on f Fig. 1.

Fig. 3 is a central vertical section taken at the point of junction ofthe ends of. the

140 protective lining and showing part of the wheel in side elevation. Il igs is an edge elevationshowing the i-oundings at the ends of thelining.

Fig. 5 is a perspective view of the lining. Fig. 6 is a cross-section onthe line 22 of Fig. 1, showing theparts with the inner tube in unflatedcondition for showing the normal relative curvatures of the parts.

Fig. 7 is a cross-section of a modification 60 of my improved device,showing the outwardly bent side edges of the lin ng.

Fig. 8 is a central vertical section of sald modification. showing theoutwardly bent ends of the lining, and, I Fig. 9 is an enlargedcross-section of'the lining L embodying my' invention,.

, with anti-friction surfaces. The lining is a PNEUMATIC T RE.

Specification of L etters Patent. v f atentea May 14=,'1918'.Application filed August 31. 1914. Serial No. 859,380. I

A represents the; body of a usual vehicle' wheel, such as an automobilewheel, about which thereis an ordinary rim-band B and locking-ring C, ofusual'constructiom'for holdlng the pneumatic tire in place, or theseparts may assume any other usual or desir-v able form or have any otherusual or desirable fastening means substituted therefor.

D represents the outer casing or shoe of an ordinary pneumatic tire, theinner pneumatic tube beingshown at E. This casing and tube may be ofordinary or usual construction. v w

F is a lining which is interposed between the outer annularportions ofthe inner pneumatic tube and the outer casing. This lining is of acompressed fibrous material provided with anti-friction surfaces 10, 11.These surfaces may, in practice, be formed by calendering said surfacesor by means of an anti-friction coating which becomes a part of thelining. ,f-"L';

The lining is formedkin cross-sectional curved form, as shown at 12, thecurvature being preferably less than the normal crosscurvature of theinner face of the outer casing, as indicated in Fig. 6, so that the'sideedges 13, 13, of said lining may normally hug the said inner .face ofsaid outer casing when the inner'tube is expanded, the eXpan-' sion ofthe inner tube forcing the tread-portion of said lining firmly againstthe inner face of the tread-portion of the outer casing.

In order to prevent abrasion of the inner face of the outer tube and theouter face of the inner tube, these side edges are preferablycro'ss-sectionally rounded as shown.

The ends of the lining are formed tapering, as shown at 14:, 15, thetapers extending throughout a suflicient portion of the length of thelining-to insure lapping of the ends as shown at 16, 16, are alsopreferably formed withfroundings, 17, 18, across the width of said ends.7

The lining is preferably a hard fibrous substance, such for instance ashard fiber, of the character of that used to great extent for electricalinsulation {so-called leather board, or similar materials, formedsubstantially self-sustaining structure but v sufliciently pliable andpreferably resilient I shifting of the lining in accordance with forconforming to the various shapes which the tread portions of the,pneumatic tire may assume in use or when meeting obstructions, thetendency of the edges and ends of the lining being to normally pressoutwardly, the lining being preferably so formed by molding or byrolling, orother suitable operation for effecting this purpose.

The normal diameter of the lining is preferably largeii than,thediameter of the annulus of the inner face of the tread'portion of theouter casing, whereby the tendency is for the; ends of the lining topress outwardly for relieving contact ofthe ends with the innerpneumatic'tube. I

This tendency-for outward pressureof the side edges of the lining andthe ends of the lining may also be effected by providing said side edgesand said ends with slight outward bends, respectively shown at 19, 20,on the modification of the lining F, shown in-Figs. 7 and 8. i

The lining is provided with anti-friction surfaces for making of it'afloa'tingmember or lining interposed between the outer face and theinner face respectively of the outer portions of the innertnbe and outercasing, so that the lining may yield andcircum'ferentiallyshift andspread to conform, to all conditions imposed upon the structure;

' The-anti friction surfaces of the lining also permit ready-shifting ofthe lining throughout its length between the inner tube and outer casingto conform to higher or lower pressures in the pneumatic tube,

and to conform to the shifting of parts'advisable when the tube strikes;a rock-or travels over uneven surfaces er in the ordinary compressionsof load and traction in the usual running of the automobile or othervehicle to which it is applied.

r The lining described, .in practice readily yields and, conforms to theshapes imposed upon the outer casing in usual travel and roadconditions,' both circumferentially' and transversely and therefore doesnot detract from the resiliency ofth'e tire. It permits ened portion.

Having thus fully described my invention, what I claim as new and desireto secure by; Letters Patent, is: 1

1. In-a pneumatictire, the combination of an inner pneumatic tube,-anouter casing, and a resilient lining of compressed fibrous material ofsubstantial-lyannular form and cross-sectionally curved; interposedbetween said tube and easing, the surface of said lining calendered forconstituting said surface an anti-friction surface. for providing readyslippage between said lining and tube.

2. In a pneumatic tire, the combination of an inner pneumatic tube; anouter casing, and an annularly arranged floating lining of compressedfibrous material having over lapping tapering ends which are pr ovided vwith end roundings' across their widths, the surfaces of said liningcalendered for ren' ,dering said'surfaces hard anti-friction sur faces,said lining interposed between the outer annular portions of said tubeand casing', and. said hard calendercd antifriction '85 surfacesproviding ready slippage of said lining annularly with relation tosaid'outer annular portions of said tubeand casing.

In testimony whereof, I have hereunto I signed my name in the presenceof two sub- '90 v scribing witnesses.

1 JAMES J. sirxrorf Witnesses: g f

" M. T. 'FLowEns,v

C. Ev oK.

